Tuyere shield



Patented Sept. 20, 1949 saigne; a carl Y s claims'." (c1.

, This invention relates to. improvedshields for Figure 2 is averticalisec ional -viewA-takensube, blast-'furnace tuyres. stantially on line II-II of Figure 1,,with the AIn' -fblast furnace ".operation; tuyre failurev coolantpipesomitted for Sake 0f clarity. L

sometimes permits molten ifmaterial or hotf gases Y g-.fReferring-m0re infdetaiito theA drawingsy Qr'steam-"to ferupt. from the tuyre,openings.l 5A .-iffI'hereis-shownat-|0;a,portionlofablastfurf Such eruptiensfareextremely hazardous, to Worknacegwall; havinga'y tuyre opening in .whichare men .inthe vicinity, Asv protection against this mounted a tuyre jacket1-|2fa tuyre cooler '|3,V

hazardf Ashields may be mounted around the a :tuyrefpipe 114-.-` anda tuyre I5 Theftuyrev tuyre pipe exteriorly of the furnace Wall.` The and tuyre coolerare waterucooled and Water is shield'temporarily. arrests material erupting from 10 circulatedthereto 'Mia-coolant pipes-15,.. |1148 and they furnace and enables workmento reach a; I9. The foregoing elements maybe ofany standplacesof safety.: Such .a shield is shown-for ex ardeonstruction; jtherefore itis deemedunnecample in Kennedy `Patent vNo. 2,281,310 assignedy es/sary.todescribethem-in greaterfdetail. 5 to National Tube Company. -Y Y r valen acrdan Wthythe present1.inventi0n, gay

Previous shields with which I am familiar have. v tuyre 4shield corriprsingeJ pairof -slidable doors,

the disadvantage rthat they do not afford sufli- 2D anliegt isf,mountedon tuyrejacket |2 mythe,

cient protection; Suchshields have vbeen spaced furnace wall. Preferably .guidelbrackets .22y areA frOm-theffurnace wail and escaping material can. fixed tothe .upperedge of. the Hbracket:opening` pass around theirouter peripheries. Thus they. tgguide slidingmovementv of the doors.. Pref-f.r

afford protection only lagainst Amaterial that; 20 erably the lower,.edge of thejacket has apertured travels ina. pathparallelto the tuyre pipeeaxie. lugs 23 and.y 24 andthe .adjacent edgesy of. the or ata slightangle thereto,` but net against ma. doors .have .similarapertured/ lugs 25 .and26-.. terial that travels f i-napath at relativelylarge When the doors areclosed, they. may be.locked. angle to` said'zaxis. #Furthermore these shields inl placeeby insertionof pins Hemd.28thr0ugh` have been hinged or otherwise fixed to the tuyre 25 the lug, apertures. .s

pipe or penstock. Consequently it has been necinner edges of doors'2n-and 2| have matessary. to remove the shield entirely to gain acing,.Substantiallysemi-circular recessesf29 and 3d, cess to the tuyre mechanism, as for'mair'itenance which, clcisely.'A receive .l tuyrepipe `|4 .whenrthes work. @0011s are closed.` The doors also havev additional An object of. thepresent vinvention-is to pro- 30 dg recesses V3|,3 72', an d`33.adaptedtoreceiver vide improved tuyre shields which are mounted. coolant pipes |6;,,|1,",'|`8',. andls, as shown .in on vthe tuyre jacket at the furnace Wall. and Flzglll 1 n.Preferably the furnace has spray have their peripheral edges engaging said jacket WaterV pintasl 34 and 35 for spraying cooling water and thereby furnish increased protectionjto in'thexs'pace vbetweenY|j,1`i5v1e`re (1301er |23 and tuvyre. workmen when tuyre failure occurs. 35 P1P L, DoprsnZ ,and 2| have .passages 36 and .A A further object ofA the invention is .tOQPrOP- 37"" hailed as inlsriedkey holeslfi,.receiving vide improved tuyre shields which normally are pipes 34 ,and 3 5.' I `Said pipes are adapted tpfpypfj,`

securely locked in place surrounding the tuyre about their `I11rltings at 38 and 39 for insper-: pipebut are Sudam@ to ,furnish easy access to tqnand remgval.. from ,the door.. passages;` At thetuyre mechanism.. v 40 mei? QEIQI VX5I1-PS .Safi DPBShaV'e plugs. A further object of the invention is to provide 4u 'which terminate short'of the door passages;y improved tuyre shields which are slidably Figure 2. mounted in the tuyre jacket and have mating Latch members 4| and 42 are pivotally edge recesses adapted to receive the tuyre pipe mounted on the exterior of doors 20 and 2| above and additional edge recesses adapted to receive passages 36 and 31 and adjacent thereto. Keepcoolant pipes and orifices to receive spray water ers 43 and 44 are fixed to the outer face of the pipes, and are provided with locking means. doors and are adapted to receive the latch mem- In accomplishing these and other objects of bers. When the latch members are engaged the invention, I have provided improved details with the keepers, they close the key hole exof structure, a preferred form of which is shown tensions of passages 36 and 31 and engage the in the accompanying drawing wherein: rearward faces of plugs 40, thereby providing Figure 1 is a front elevational View of a portion additional means for locking the doors and spray of a blast furnace tuyre mechanism having a pipes in place. shield embodying features of the present inven- D00rs 20 and 2| preferably are equipped With non installed thereon, handles 45, 46, 41 and 48 to facilitate their open- Thus the shield leaves no space for matter-to.

escape around its edges. The shield is, securely,

locked, in place normally, but is supported for easy sliding movement to furnish accessto the tuyre mechanism.

While I have shown but a single embodiment of the present invention, it is apparent that modifications may arise. Therefore I do not wish to be limited by the disclosure set forth, but only by -f the scope of the appended claims. v

I claim: Y 1. In combination with a blast furnace, a tuyre shield comprising a pair of doors slidably mounted at the exterior of the furnace wall and in closed position surrounding'the tuyre pipe, the outer peripheral edges of said shield engaging the wall to close off the tuyre opening against escape of material on tuyre failure, said doors opening by sliding movement in opposite directions away from the tuyre pipe.

2. In combination with a blast furnace, a tuyre shield comprising a pair of doors slidably mounted at the exterior of the furnace wall and having mating recesses in their inneredges adapted to receive the tuyre, pipe and additional recesses adapted to receive coolant pipes, said doors in closed position surrounding the tuyre pipe, said doors opening by sliding movement in opposite directions away from the tuyre pipe.

3. In combination with a blast furnace, a tuyre shield comprising a pair of doors slidably mounted at the exterior of the furnace wall and in closed position surrounding the tuyre pipe, and releasable means flor locking said doors in closed position, the outer peripheral edges of said shield engaging the wall to close off the tuyre opening against escape of material o n tuyre failure, said doors opening by sliding movement in opposite directions away from the tuyre pipe.

4. In combination with a blast furnace, tuyre shield comprising a pair of doors l.slidably mounted on the tuyre jacket at the exterior of the furnace wall and in closed position surrounding the tuyre pipe, and releasable means for locking said doors in closed position, said doors opening by sliding movement in opposite directions away fro-m the tuyre pipe.

5. In lcombination with a blast furnace, a tuyre shield comprising` a pair of doors slidably mounted on the tuyre jacket at the exterior of the furnace wall, and releasable means for locking said doors in closed position, said doors having mating edge recesses adapted to receive the tuyre pipe and passages to receive coolant pipes, said doors opening by sliding movement in opposite directions away flQm @E @Mre Rip@ 6. In combination with a blast furnace, a tuyre shield comprising a pair of doors slidably mounted on the tuyre jacket at the exterior of the furnace wall, releasable means for locking said doors in closed position to the jacket, said doors having mating` edge ,recesses adapted to receive the tuyre pipe,` additional recesses adapted to receive coolant pipes, and passages adapted to receive water spray pipes, saidY doors opening by sliding movement in opposite directions away from the tuyre pipe.

"7." In combination withl a blast furnace, a tuyre shield comprising a pair of doors slidably mounted on the tuyre jacket at the exterior of the furnace wall, releasable means for locking said doors in closed position to the jacket, said doors having mating edge recesses adapted to receive the tuyre pipe, additional recesses adapted to receive coolant pipes, and passages adapted to receive water spray pipes, latch bars on said'doors cooperable with the water spray pipes, and keepers on said doors for receiving said latch bars.

8. In combination'with a blast furnace, a tuyre shield comprising a pair of doors slidably mounted on the tuyre jacketv at the exterior of the furnace wall, releasable means for locking said doors in closed position to the jacket, said doors having mating Vedge recesses adapted to receive the tuyre pipe, additional recesses adapted to receive coolant pipes, and passages adapted to receive water spray pipes, latch bars on said doors cooperable witnthe water spray pipes,V keepers on said doors for receiving said latch bars and handles on said doors to facilitate their operation and being cooperable with said latch bars to engage the latter automatically with said keepers.

' EARL C. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 184,161 Little Nov. 7, 1876 319,270 Lanjori June 2, 1885 1,285,283 McCiintock Nov. 19, 191,8

1,690,297 Hoge Nov. 6, 1928 v2,281,310 Kennedy Apr. 28, 1942 FOREIGN PATENTS Number Country i Date 417,200 CfreatV Britain Oct. 1, 1934 

